- Added a new controller, volumeattributesclass-protection-controller, into the kube-controller-manager.
  The new controller manages a protective finalizer on VolumeAttributesClass objects. ([#123549](https://github.com/kubernetes/kubernetes/pull/123549), [@carlory](https://github.com/carlory)) [SIG API Machinery, Apps, Auth and Storage]

### Instrumentation

In v1.9 we focused on improving stability of the components owned by the SIG, including Heapster, Custom Metrics API adapters for Prometheus, and Stackdriver.

- kube-apiserver

  - the `--basic-auth-file` flag and authentication mode is deprecated and will be removed in a future release. It is not recommended for production environments. ([#81152](https://github.com/kubernetes/kubernetes/pull/81152), [@tedyu](https://github.com/tedyu))

now always set to "systemd" unless the user is explicit about it. This requires existing machine setups to configure the container runtime to use the "systemd" driver. Documentation on this topic can be found here: https://kubernetes.io/docs/setup/production-environment/container-runtimes/. When upgrading existing clusters / nodes using "kubeadm upgrade" the old cgroupDriver value is preserved, but in 1.22 this change will also apply to "upgrade". For more information on migrating to the "systemd" driver...

  purposes, you can use older kernels, as far back as 5.4, if you set the
  `nftables.skipKernelVersionCheck` option in the kube-proxy config, but this is not
  recommended in production since it may cause problems with other nftables
  users on the system.) ([#124152](https://github.com/kubernetes/kubernetes/pull/124152), [@danwinship](https://github.com/danwinship)) [SIG Network]

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CSI was first introduction as alpha in Kubernetes v1.9 and moved to beta in Kubernetes v1.10.

You can find a list of sample and production drivers in the [CSI Documentation](https://kubernetes.io/docs/concepts/storage/volumes/#csi).

 *   Added utility `tf.keras.utils.FeatureSpace`, a one-stop shop for structured data preprocessing and encoding.

base or scalar field, // which have the same bytes length for all NIST P curves. const {{.p}}ElementLength = {{ .ElementLen }} // {{.P}}Point is a {{.P}} point. The zero value is NOT valid. type {{.P}}Point struct { // The point is represented in projective coordinates (X:Y:Z), // where x = X/Z and y = Y/Z. x, y, z *{{.Element}} } // New{{.P}}Point returns a new {{.P}}Point representing the point at infinity point. func New{{.P}}Point() *{{.P}}Point { return &{{.P}}Point{ x: new({{.Element}}), y: ...

## **Major Themes**

Kubernetes 1.7 is a milestone release that adds security, stateful application, and extensibility features motivated by widespread production use of Kubernetes.